Karlsruhe Astrophysical Database of Nucleosynthesis in Stars
s-process
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p-process
Available isotopes for Iridium (Z=77)
  191Ir   192Ir   193Ir
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Recommended MACS30 (Maxwellian Averaged Cross Section @ 30keV)
193Ir 194Ir




Cross sections do not include stellar enhancement factors!
History
VersionTotal MACS [mb]Partial to gs [mb]Partial to isomer [mb]
0.0994 ± 70--

(Version 0.0 corresponds to Bao et al.)
Comment
Rec. value is from Jaa97. MACS vs. kT table are normalized values from endfb71 and jeff312. Uncertainty for extrapolated values is from covariace data endfb71 plus deviation between both libraries.
Last review: April 2014
List of all available values
originalrenorm.yeartypeCommentRef
566.7 ± 32.6
E(n)= 55 (8) keV
2009cF.N.B., Act., 197Au: 414.6 mb (ENDF/B-VI.8) TAH09
994 ± 70
1997cVdG, Act., 1/v(kT), Au:RaK88Jaa97
864 ± 43
1978bLinac, TOF, 6Li+235U:B-VMDM78
1120 ± 115
2011eENDF/B-VII.1 incl. covariancesendfb71
949
2004eJEFF-3.1jeff31
600 ± 80
1971eAGM71
472
2005tMOST 2005Gor05
554
2002tMOST 2002Gor02
655
2000tNON-SMOKERRaT99
1132
1981tHar81
1120
1976tHWF76


Original:MACS [<σ v>/vT] (mb) for kT=30 keV, based on the published cross sections except where indicated otherwise.
Renorm:MACS [<σ v>/vT] (mb) for kT=30 keV for which the reference or standard cross section was meanwhile improved.
Type: The letters and numbers in the column labelled 'type' give information on how the cross section has been obtained:
cDirectly quoted from the reference itself
bCalculated from smooth cross sections with model fit: ln(sigma) = a + a1 ln(E) + a2 ln^2(E)
eEvaluated value taken directly from the reference
tTheoretical value
MACS, SEF and Reaction Rates for different energies
Energy5keV8keV10keV15keV20keV25keV30keV40keV50keV60keV80keV100keV
MACS
3374 ± 371
-
2057 ± 224
1557 ± 168
1287 ± 137
1115 ± 99
994 ± 70
833 ± 70
728 ± 71
652 ± 64
548 ± 54
478 ± 48
Xfactor1.001.001.000.980.920.840.750.590.480.400.300.24
SEF1.001.001.001.001.021.031.061.101.131.161.201.22
Rate
2.00
-
1.72
1.61
1.55
1.53
1.52
1.53
1.54
1.55
1.56
1.54

MACS:
Reference: Jaa97, endfb71, jeff312
Procedure: 'e+t' (The MACS from kT=5 keV to 100 keV are derived from calculated cross sections, which are then normalized to experimental data, e.g. to the values at kT=25 keV obtained in activation measurements. In these cases the uncertainties should be linearly increased below 25 and above 30 keV to reach about 30% at the extreme kT values.)
Year: 1997,2013

X-factor:
Reference: Rau12
Year: 2012

SEF (Stellar enhancement factor):
Reference: Rau09
Year: 2009
Comment:

Rate:
Reaction rate NA<σv> given in 108 cm3/mole/s, including SEF
Chart of nuclei
up
left
193Au
17.65 h
β+
194Au
1.58 d
β+
195Au
186.11 d
β+
196Au
6.17 d
β+
197Au
100
582 mb
192Pt
0.782
590 mb
193Pt
50.01 a
1123 mb, β+
194Pt
32.967
365 mb
195Pt
33.832
860 mb
196Pt
25.242
183 mb
191Ir
37.3
1350 mb
192Ir
73.83 d
2080 mb, β-
193Ir
62.7
994 mb
194Ir
19.28 h
β-
195Ir
2.50 h
β-
190Os
26.36
274 mb
191Os
15.40 d
1290 mb, β-
192Os
40.93
155 mb
193Os
1.25 d
β-
194Os
6.00 a
β-
189Re
1.01 d
β-
190Re
3.10 m
β-
191Re
9.80 m
β-
192Re
16.00 s
β-
193Re
30.00 s
β-
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Isotope: Iridium